fix .old backup for grub2's grub.cfg

rationale: write_*() takes (bootloader, all_hd, ext) as parameters (when
called from installkernel -> bootloader-config and then only when
migrating to uuids

as we don't care for 2 first for grub2, just ignore the 3rd too

1 files changed, 2 insertions, 3 deletions

diff --git a/perl-install/bootloader.pm b/perl-install/bootloader.pm
index b99db9f83..2451df253 100644
--- a/perl-install/bootloader.pm
+++ b/perl-install/bootloader.pm
@@ -1903,12 +1903,11 @@ sub write_grub2_default_entry {
     }
 }
 
-sub write_grub2 {
-    my ($o_backup_extension) = @_;
+sub write_grub2() {
     my $error;
 
     my $f1 = "$::prefix/boot/grub2/grub.cfg";
-    renamef($f1, $f1 . ($o_backup_extension || '.old'));
+    renamef($f1, $f1 . '.old');
     run_program::rooted($::prefix, 'update-grub2', '2>', \$error) or die "update-grub2 failed: $error";
     log::l("update-grub2 logs: $error");